Before the use of polymer cements in the 1990’s a pebble dashed finish could look tired and dull after
several decades. Avant Coatings Ltd is often called upon to rejuvenate such a property. With many coatings
and rendering systems available we can find the right solution at an affordable price. It is possible to
render onto pebbledash providing the substrate is in a good condition and the backing render is sound and solid.

There are two main types of system available to render onto pebbledash. The first is a common type of render
such as a lime render or polymer render which will produce a flat or scraped finish, the second is an
acrylic or resin (or enamel) render, which will blend a certain level of the pebbles or spar out but still
leave a nice textured finish. Both systems dramatically improve the look of any building and cover over the
old tired pebbledash

Hydraulic Lime or Polymer Render onto Pebbledash

The loose pebbles or spar first needs to be removed by water jet method with the
use of a strong shovel. Any minor repair should then be carried out to the
substrate before a render is applied. When rendering onto pebbledash, careful
consideration needs to be taken when selecting the rendering materials, older
pebbledash will be lime based, a cement or polymer cement based render is not
suitable to render over a lime based mortar due to the rigid, impermeable nature
of the cement. Only Hydraulic Lime based products should be used to render over
lime based pebbledash.

This is not to say Polymer rendering products are not good products... they are
very good, but simply unsuitable for rendering over lime based materials and structures.

Acrylic or Resin (Enamel) Render over Pebbledash

An alternative and less intrusive method of rendering over pebbledash is an
acrylic or resin (enamel) render coat. During the initial survey the decision
would be made as to whether an acrylic or resin render coat would be most suited
to the building. This analysis would be based on the walls age, type, condition
and exposure to bad weather. The application of a lime wash or cement wash
(often called a slush coat or bagging coat) is needed to stabilise the wall
and provide an ideal surface to apply. The acrylic or resin render is available
in many colours and is particularly desirable if you are wishing to cover up
repair work or an alteration to an exterior wall. It often works out cheaper
than lime or polymer rendering and can look just as good if not better.

We aim to achieve the highest standards in terms of product application
and customer service in every project we partake. That’s why we offer
every customer a chance to provide us with feedback, so we can continuously
refine our process and maintain our high reputation.
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